You need:
1 cup of about 70% dark chocolate (I used Cuisine Camino 71% Baking Chocolate), chopped into 1 to 1/2 inch cubes
3/4 cup of butter, chopped into 1/2-inch cubes
1 tsp real vanilla extract
3 eggs
1 1/3 cup sugar (again, I used Camino brand for the sugar – it’s golden cane sugar that is both organic and fair trade and not bleached!)